Does np gain stack in any way?
for example:
If i have np gain CE and have activated art's peformance ability like kerry magecraft does np gain stack from both or does only the strongest one apply.
Yes NP gain and Arts performance stack.
I know it works because by using Mordred Rider, she can return to 100% gauge after NP with: self arts buff, +NP gain from Nero Bride and +NP gain from Sanzang. If I remove any of these buffs I get less NP refund.
Arts performance is a combination of damage + NP gain when using Arts card.
I dont know if my picture was uploaded successfully or not, but this is a example. Atalante's NP can spammed when Quick-up activated for her 1st NP, but her 2nd NP wont be spammed because she loss the Quick-up status.
Same thing for Art-up. Both can be stacked by NP-gain-up.
